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Anterior Cardiac Veins
The anterior cardiac veins (or anterior veins of right ventricle) are a variable number of small veins (usually 2-5) which drain blood from the anterior portion of the right ventricle into the right atrium. Anatomy The right marginal vein frequently opens into the right atrium, and is therefore sometimes regarded as belonging to this group. Fate Unlike most cardiac veins, the anterior cardiac veins do not end in the coronary sinus The coronary sinus () is the largest vein of the heart. It drains over half of the deoxygenated blood from the heart muscle into the right atrium. It begins on the backside of the heart, in between the left atrium, and left ventricle; it begi ...; instead, they drain directly into the anterior wall of the right atrium. References {{Authority control Veins of the torso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Right Coronary Artery
In the coronary circulation, blood supply of the heart, the right coronary artery (RCA) is an artery originating above the right cusp of the aortic valve, at the Aortic sinus, right aortic sinus in the heart. It travels down the right coronary sulcus, towards the crux cordis, crux of the heart. It gives off many branches, including the sinoatrial nodal artery, Right marginal branch of right coronary artery, right marginal artery, posterior interventricular artery, conus artery, and atrioventricular nodal branch. It contributes the right side of the heart, and parts of the interventricular septum. Structure The right coronary artery originates above the Aortic sinus, right aortic sinus above the aortic valve. It passes along the right coronary sulcus, coronary sulcus (right atrioventricular groove) towards the Crux cordis, crux of the heart. Segments * Proximal: starting at RCA origin, spanning half the distance to the Right border of heart, acute margin * Middle: from proxim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Cardiac Vein
The great cardiac vein (left coronary vein) is a vein of the heart. It begins at the apex of the heart and ascends along the anterior interventricular sulcus before joining the oblique vein of the left atrium to form the coronary sinus upon the posterior surface of the heart. Anatomy Course The great cardiac vein ascends along the anterior interventricular sulcus to the base of the ventricles. It then curves around the left margin of the heart to reach the posterior surface. Fate Upon reaching the posterior surface of the heart, the great cardiac vein merges with the oblique vein of the left atrium to form the coronary sinus. At the junction of the great cardiac vein and the coronary sinus, there is typically a valve present. This is the Vieussens valve of the coronary sinus. Tributaries The great cardiac vein receives tributaries from the left atrium The atrium (; : atria) is one of the two upper chambers in the heart that receives blood from the circulatory sy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Right Marginal Vein
The right marginal vein is a vein of the heart running along the inferior margin of the heart. It drains adjacent region of the right ventricle. It usually opens directly into the right atrium, but may sometimes instead empty into the anterior cardiac veins, or (less commonly) the coronary sinus The coronary sinus () is the largest vein of the heart. It drains over half of the deoxygenated blood from the heart muscle into the right atrium. It begins on the backside of the heart, in between the left atrium, and left ventricle; it begi .... The right marginal vein often considered as one of the anterior cardiac veins. References Veins of the torso {{circulatory-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Right Atrium
The atrium (; : atria) is one of the two upper chambers in the heart that receives blood from the circulatory system. The blood in the atria is pumped into the heart ventricles through the atrioventricular mitral and tricuspid heart valves. There are two atria in the human heart – the left atrium receives blood from the pulmonary circulation, and the right atrium receives blood from the venae cavae of the systemic circulation. During the cardiac cycle, the atria receive blood while relaxed in diastole, then contract in systole to move blood to the ventricles. Each atrium is roughly cube-shaped except for an ear-shaped projection called an atrial appendage, previously known as an auricle. All animals with a closed circulatory system have at least one atrium. The atrium was formerly called the 'auricle'. That term is still used to describe this chamber in some other animals, such as the ''Mollusca''. Auricles in this modern terminology are distinguished by having thicker ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Right Ventricle
A ventricle is one of two large chambers located toward the bottom of the heart that collect and expel blood towards the peripheral beds within the body and lungs. The blood pumped by a ventricle is supplied by an atrium (heart), atrium, an adjacent chamber in the upper heart that is smaller than a ventricle. Interventricular means between the ventricles (for example the interventricular septum), while intraventricular means within one ventricle (for example an intraventricular block). In a four-chambered heart, such as that in humans, there are two ventricles that operate in a double circulatory system: the right ventricle pumps blood into the pulmonary circulation to the lungs, and the left ventricle pumps blood into the systemic circulation through the aorta. Structure Ventricles have thicker walls than atria and generate higher blood pressures. The physiological load on the ventricles requiring pumping of blood throughout the body and lungs is much greater than the pressure g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vein
Veins () are blood vessels in the circulatory system of humans and most other animals that carry blood towards the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are those of the pulmonary and fetal circulations which carry oxygenated blood to the heart. In the systemic circulation, arteries carry oxygenated blood away from the heart, and veins return deoxygenated blood to the heart, in the deep veins. There are three sizes of veins: large, medium, and small. Smaller veins are called venules, and the smallest the post-capillary venules are microscopic that make up the veins of the microcirculation. Veins are often closer to the skin than arteries. Veins have less smooth muscle and connective tissue and wider internal diameters than arteries. Because of their thinner walls and wider lumens they are able to expand and hold more blood. This greater capacity gives them the term of ''capacitance vessels''. At any time, nearly 70% o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Right Atrium
The atrium (; : atria) is one of the two upper chambers in the heart that receives blood from the circulatory system. The blood in the atria is pumped into the heart ventricles through the atrioventricular mitral and tricuspid heart valves. There are two atria in the human heart – the left atrium receives blood from the pulmonary circulation, and the right atrium receives blood from the venae cavae of the systemic circulation. During the cardiac cycle, the atria receive blood while relaxed in diastole, then contract in systole to move blood to the ventricles. Each atrium is roughly cube-shaped except for an ear-shaped projection called an atrial appendage, previously known as an auricle. All animals with a closed circulatory system have at least one atrium. The atrium was formerly called the 'auricle'. That term is still used to describe this chamber in some other animals, such as the ''Mollusca''. Auricles in this modern terminology are distinguished by having thicker ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coronary Sinus
The coronary sinus () is the largest vein of the heart. It drains over half of the deoxygenated blood from the heart muscle into the right atrium. It begins on the backside of the heart, in between the left atrium, and left ventricle; it begins at the junction of the great cardiac vein, and oblique vein of the left atrium. It receives multiple tributaries. It passes across the backside of the heart along a groove between left atrium and left ventricle, then drains into the right atrium at the orifice of the coronary sinus (which is usually guarded by the valve of coronary sinus). Structure Origin The coronary sinus arises upon the posterior aspect of the heart between the left atrium, and left ventricle. The coronary sinus commences at the union of the great cardiac vein, and the oblique vein of the left atrium. The origin of the coronary sinus is marked by the Vieussens valve of the coronary sinus which is situated at the endpoint of the great cardiac vein. Cour ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle Cardiac Vein
The middle cardiac vein commences at the apex of the heart. It passes posteriorly along the inferior interventricular sulcus to end at the coronary sinus near the sinus' termination. Structure Origin The middle cardiac vein commences at the cardiac apex (here, it is contiguous with the great cardiac vein, thus forming - along with the coronary sinus The coronary sinus () is the largest vein of the heart. It drains over half of the deoxygenated blood from the heart muscle into the right atrium. It begins on the backside of the heart, in between the left atrium, and left ventricle; it begi ... - a complete venous circle). Variation The middle cardiac vein has a constant location on the surface of the ventricles. Clinical significance The middle cardiac vein is useful for epicardial access to the inferior side of the ventricles. References External links * - "Posterior view of the heart." Veins of the torso {{circulatory-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Small Cardiac Vein
The small cardiac vein, also known as the right coronary vein, is a coronary vein that drains parts of the right atrium and right ventricle of the heart. Despite its size, it is one of the major drainage vessels for the heart. Anatomy Course The small cardiac vein runs in the coronary sulcus between the right atrium and right ventricle, and opens into the right extremity of the coronary sinus. Territory The small cardiac vein receives blood from the posterior portion of the right atrium and ventricle. Variation The small cardiac vein may empty into the coronary sinus, right atrium The atrium (; : atria) is one of the two upper chambers in the heart that receives blood from the circulatory system. The blood in the atria is pumped into the heart ventricles through the atrioventricular mitral and tricuspid heart valves. ..., or middle cardiac vein. It may be absent. References External links * - "Anterior view of the heart." {{Authority control Veins of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atrial Branches Of Coronary Arteries
The atrial branches of right coronary artery derive from the right coronary artery and provide part of the blood supply to the right atrium and left atrium. Although named for the right coronary artery in Terminologia anatomica, a portion of the blood supply to the atria derives from the Circumflex branch of left coronary artery The circumflex branch of left coronary artery (also known as the left circumflex artery or circumflex artery) is a branch of the left coronary artery. It winds around the left side of the heart along the atrioventricular groove (coronary sulc .... External links Image References {{Authority control Arteries of the thorax ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atrioventricular Nodal Branch
The atrioventricular nodal branch is a coronary artery that supplies arterial blood to the atrioventricular node, which is responsible for initiating muscular contraction of the ventricles. The AV nodal branch is most often a branch of the right coronary artery. Structure Origin The atrioventricular nodal branch sees significant variation in origin: * proximal posterolateral branch from the right coronary artery in around 77%. * distal posterolateral branch from the right coronary artery in around 2%. * distal right coronary artery in around 10%. * right posterior interventricular artery in around 7%. * distal circumflex branch of left coronary artery in around 4%. The right coronary artery supplies the atrioventricular node in around 90% of people. In approximately 2% of people, the vascular supply to the atrioventricular node arises from both the right coronary artery and the left circumflex branch.Sow ML, Ndoye JM, Lo EA. The artery of the atrioventricular node: an anat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
